Six-wheel truck



, 1,5'2o,-1'76 F. R. CORNWALL v S IX-WHEEL TRUCK Filed Dec. 29, 1922 s-sneozb-sneeta v F. R. CORNWALL SIX-WHEEL TRUCK I Sheets-Sheet 2 7 Filed Dec. 29, 1922 I g frz ae'iziar" /A HM m F. R. CORNWALL SIX-WHEEL muck Dec. '23, 1 24. 1,520,176

Filed Dec. 29. 1922 'ash e'ta-sheet a.

Patented Dec. 23, 1924. 1,520,176

umrno STATESPATENT omucagz ,SR-WHEEL TRUCK.

Application flled December 29, 1922. Serial.,No.i-$09,d23.

To all whom it may concern: i

Be it known that I, FREDERICK R. Conn wheel pieces extend towardeach other and WALL, a citizen of the United States, resid- ICIOSS intermediate heir finds-and he. ends ing at St. Louis, Missouri, have invented of each Wheel piece not mounted on the a certain new and useful Improvement in journal boxes, 3 extend over the journal Six-Wheel Trucks, of which the following box mounted end of the other wheel piece -is a full, clear, and exact description, such and is supported therefrom by means f as will enableothers skilled in the art to oompressed coil spring 6.- I refer-to the of each pair. It will be noted'that the which it appertains to make and use the journal box mounted ends of the Wheel same, reference being bad tov the accomplecesas their fixed ends and to the opp panying drawings, forming part of this site ends as their free ends, although the li ation, ournal box end is not rigidly secured to My invention relates to six wheel trucks the journal box nor is thefopposite end for railroad rolling stock and consists in unrestricted in its movement. an articulated equalizing truck frame simi- Wheel pieces 4ai1d ,5 are pivoted to each lar to the four wheel truck frame described, other at their crossing points by means of l I in my copending application Serial Numaball and, socket joint comprising a ball ber 603,591, filed November 27, 1922. i member 7 seated in opposed sockets formed The objects of my invention are to pro- 1n the wheel pieces; The .load carriedv by vide in a heavy duty six wheel truck a the truck is transmitted to the two pairs high degree of flexibility both in vertical of wheel pieces on each side of the truck and horizontal planes and to obtain these' by a'yoke 12 which is connected toIthe wheel results by means of simple economical conpieces through ball 7. The yoke. straddles struotion which preferably includes the use each pair of wheel pieces at their crossing of cast steel elements which provide for. point and-is pivotally connected to therball a minimum amount of assembly work, dead by means of a bolt 9. The forked ends weight, and undesirable joints. 8 of the yoke form positive retaining ele- In the accompanying drawings WhlCh ilments for the wheel pieces to'prevent their l trat my inventlon lateral separation but itwill be understood ,Figure 1 is a top view of one side ofa that the wheel pieces are yieldingly mains truc a detail of the truck being sectioned tained in the relative transverse position horizontally for clearer illustration. shown in Figure 1 by the expansion force of Figure 2 is a side elevation of the truck. spr ngs 6 which are seated in-suitable re- Figure 3, is a top View and horizontal cesses 10; and 11 formed on the upper and section on an enlarged scale of-the wheel lower faces, respectively, of the wheel pieces piece and journal box assembly at the midand are vertically aligned when the wheel dle wheel. I pieces contact with each other at theirmeet- Figure 4 is a vertical transverse section lng face as shown. 1 Y

1 taken on the line 44 of Figure 2. The fixed end of each of the 'wheel pieces Figure 5 is a similar section taken on 5 straddles itsrespective journalbox and is the line 5-5 of Figure 2. provided on all journal box engaging faces Figures 6 and 7 are, respectively, a top with convex projections. 13 which enga e view and a side elevation, sectioned in part, the walls of'the journal box, thus provi I of a modified form of my invention. 1 ing spherical engagemen't-ofthe faces which" 7 The truck structure includes theusual permits a limited amountof pivotal movewheels 1 and axles 2 and journal boxes 3 ment between them. The-fixed ends of wheel slightly modified from the standard journal pieces 4 are mounted upon thelmiddle jourboxes. Each truck side frame mounted nal box by means of a common saddle 14 upon the journal boxes includes two pairs having spherical bosses 15 corresponding of crossed arms or wheel pieces, one arm to bosses l3 and similarly engaged with the or wheel piece 4 of each pair being supmiddle journal box; The connection beported at one end upon the middlejourtween wheel pieces 4 and saddle 14 is a nal box while the end'jpurnal boxes suppivotal one provided by bolts 16 which port one end of the, 0t

er wheel piece 5 permits one wheel piece 4 to move about the saddle as a pivot without necessarily affecting the other wheel piece 4. This pivotal movement may be' in a horizontal plane as well as in a vertical plane due to the rounding of the wall of the bolt engaging hole-in the wheel pieces as best shown in Figure 3. The engagement of the saddle with the journal box is such that there may be relative pivotal movement between them.

Extensions 17 are formed on the outer ends of wheel ieces 5 to provide integral supports for t e brake rigging indicated at 18 and a rigid point of attachment for truck frame end members 19 which may consist of rods threaded at their ends and secured to extensions 17 by nuts 20.

In the construction. illustrated in Figures 1 to 5, the body bolster 21 forms part of thecar underframe,andhas a ball and recesses in the crossed and replace usually provided for that purpose.

socket connection at each end with the oppositely arran ed yokes 12. A king pm 21 may be use if desired.

I In the modified form shown in Figures 6. and 7, which is a type 'of swiveling truclg, the yokes are formed integrally with a truck bolster member, and-the ends of the yoke members are provided with spaced ball elements 22 which are seated in corresponding wheel pieces compris-.

ing the truck side frame.

. These wheel pieces 23 and 24 resemble wheel pieces 4 and 5 but it will be noted that the spring supports 25 and 26 are provided immediately over the end and middle journalboxes, respectively, and the inner fixed ends of wheel pieces 24 accordingly overlap each other as do the inner pieces 23.

The construction shown in Fi res 6 and 7 is a very slmple one and may satisfactorily used'for standard six wheel truck requirements. Like the form shown in Figures 1'to 5, it contains many points of flexibility and the passage of the wheels over anyelevation or depression in the track will not materially vary the angle of the bolster center plate 27. The truck side frames act asspring supported equalizing members and their pivotal axescause the wheels to move vertically in defined arcuate paths.

In both forms of my invention the load may be transmitted to the wheels as desired, the spacing of the pivotal crossing points between the journal boxes serving to proportion the distribution of the load, and it will be noted that the wheel pieces serve as spring supported equalizers thus eliminating the additional members and connections thermore, there is ample space to remove fbrake-heads and shoes withoutunhanging the brake beams.

I claim:

1. In a six wheel truck, two pairs of crossed wheel pieces on each free ends of wheel Fur- , opposite free end axle journal boxes,

side of the truck, each wheel piece being supported at one end upon a journal box and at its opposite end upon another wheel piece.

2. In a six wheel truck, axle journal boxes, two pairs of crossed wheel pieces on eac sideof the truck, each wheel piece bein supported at one end upon a journal box an at its opposite end upon another wheel piece, and bolster carrying means supported from the crossing points of said wheel pieces.

3. In a six wheel truck, axle journal boxes, two pairs of crossed wheel pieces on each side of the truck, one wheel piece of each pair being supported at one end upon journal box and at its opposite end upon the other wheel piece of that pair.

4. In a six wheel truck, axle journal boxes, two pairs of crossed wheel pieces on each side of the truck, one wheel piece of each pair being supported at one end upon a journal box and at its opposite end upon the other wheel piece of that pair, and a bolster supporting yoke pivotally mounted upon said wheel pieces at their crossing points.

5. In a six wheel truck, axle journal boxes, two pairs of crossed wheel pieces forming a truck side frame, one end of one wheel piece of each pair being supported upon the middle journal box, one end of one wheel piece of each pair being supported upon one of the end journal boxes, the other end of each of said wheel pieces being supported upon anotherof said 'wheel pieces.

6. In a six wheel truck, axle journal boxes, two pairs of crossed wheel pieces forming a truck side frame, one end of one wheel piece of each pair being supported upon the middle journal box, one end of one wheel piece of each pair being supported upon one of the end journal boxes, the other end of each of said wheel pieces being supported upon another of said wheel pieces, and load carrying means supported by each pair of said wheel pieces at their crossing point.

7. In a six wheel truck, articulated wheel pieces serving as equalizers for the load on the truck frame, a bolster therebetween, and means for supporting the bolster at a point coincident wit the oints between said articulated wheel piece members.

8. In a six wheel truck, axle journal boxes, a pair of articulated wheel pieces between the middle journal box on each side of the frame and each end journal box, and a bolster supported on both of said pairs of wheel pieces, each of said pairs of wheel pieces serving asan equalizer for the load carried by the bolster.

9. In a six wheel truck, axle journal boxes, wheel pieces each having a fixed end mounted upon" one of the journal boxes with its extending above an adjacent wheel piece, and springs su ported on the latter, the free ends of the w eel pieces mounted on the end journal boxes having has Mill

llti

ends of spaced s ring supports over the fixed ends of the w eel pieces mounted upon the middle journal box.

10. In a six wheel truck, axle journal boxes, wheel pieces each having a fixed end mounted upon one of the journal boxes with its opposite free end extending above an adjacent wheel piece, and springs supported on the latter, the free ends of the wheel pieces. mounted on the end journal boxes having spaced spring supports over the fixed the wheel pieces mounted upon the middle journal box, the two wheel mass at each end of each side of the true bein crossed intermediate their ends and adap to support the truck load at their crossing points.

11. In a six wheel truck, axle journal boxes, wheel pieces each having a fixed end mounted upon one of the journal boxes with its opposite free end extending above an adjacent wheel piece, and springs supported on. the latter, the free ends of the wheel pieces mounted on the end journal boxes having spaced sprin supports over the fixed ends of the whee pieces mounted upon the middle journal box, the two wheel ieces at each end of each side of the truck ein crossed intermediate'their ends and adapted .30

to support the truck load at their crossin oints, and ada ted todistribute the tr'ucl oad equally tot e axle journal boxes.

12. In a six wheel truck, axle journal wheel boxes, a saddle on the middle journal box, pieces mounted on each end journal box, and wheel pieces secured at one end to said saddle and extending toward the end of the truck with their other ends supported upon .said first-mentioned wheel pieces.

13. In a six wheel truck, boxes, a saddle on the middle wheel pieces pivotally secured to said saddle and extending toward theen'd of the truck, other wheel pieces respective] mounted upon the end journal boxes an ward the middle of the truck each crossin one of said first-mentioned wheel pieces an having its inner end su orted upon the same adjacent to said sad d e.

1 wheel truck,

axle journal a six boxes, a saddle middle journal x, and wheel otally mounted upon said saddle journal'boxes.

15. In a six wheel truck, axle journal boxes a saddle ivotally mounted upon the midd e journal box, and wheel ieces piv-' otally mounted upon said sadd e and the end journal boxes, and means yieldingly maintaining longitudinal alignment of said wheel pieces.

axle journal pieces ivand the zend In testimony whereof I hereunto aflix my signature this 27th day of December,

FREDERICK R. CORNWALL.-

journal box,

extending 'toivotally mountednpon the 

